Hey all i repaired this set by replacing a single led smack dab in middle of screen. All is well with this set. Would act like it was going to turn on but no brief flash as you normally get. No picture notta. Led voltages would spike then slowly go down.
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Re: LG 39ln5300
We need pictures of the power supply board.
How high does the LED Voltage jumps up to? Same Voltage without the LED connector in place?
It sounds like you still have open circuit in the LED string.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809 -
Re: LG 39ln5300
Budm op is reporting what he did to fix tv.I assume no responsibility for any stupid suggestions I might post.Comment
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Re: LG 39ln5300
I must have misread his post, I thought he replaced the LED and get the brief flash and that is all.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: LG 39ln5300
yeah was reporting how it was fixed. Thanks budComment
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Re: LG 39ln5300
Evening and apologies for the slight high jacking of this thread (though it is the same model)
My LG TV that lost its picture but sound was still available. I followed a YouTube troubleshooting guide by performing the following (below), but have run into a scenario not covered by the video guide.
1) I performed the flashlight test, which did tell me I had a picture and sound, thus concluded backlights were out (none visible through the top vents, as well)
2) Performed the voltage checks on the PWR SPLY board with the LED cable connected and disconnected (https://www.youtube.com/watch?v=2pyuXwNkBMA&t=365s):
a. With cable connected, LED + TP was @ 155 VDC
b. With cable dis-connected, LED + TP was @ 85 VDC
c. I believe with this scenario, I am still looking at bad LED strips, I just needed a second opinion before placing an order for parts (and help deciphering which LED strips to purchase)
I was hoping someone could clarify my results, or put me down another troubleshooting path. Noob appreciation to the highest.
Senor Siesta
Portland, ORComment
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Re: LG 39ln5300
Yes you do have a bad Backlights problem. You need to strip down the Panel to get to the backlights so that you could see the numbers labelled on the each strip.Comment
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Re: LG 39ln5300
Much appreciated Andrew, thanks for confirming!Comment
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I just acquired this portable aircon, history unknown. Its behaviour is quite strange:
- When turned on and placed into cooling mode, the upper fan (cold air out) just spins slowly. The compressor and lower fan do not run.
- If the device is then placed into heating mode and then back into cooling mode, the lower fan and compressor kick in and start cooling, but the upper fan still only spins slowly.
- If the device is placed into fan-only mode, the upper fan does not respond to low/medium/high speed toggles - just keeps running slowly.
- Display and buttons all behave normally aside from the
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Hi, i have a Lenovo S145 that after 20 seconds shutdown and restart (it's working correctly on thse 20 seconds)
everything seems ok, but on Vcore inductor ( this is an i3 with just 1 switching power supply for CPU)
there is an output to teh CPU with a spike.. seems that inductor can't handle the input...
replaced the capacitor (330) and the inductor (R15) without any change
any idea? very thank you!
input of the inductor seems as usual... only strange thing is that the upper/lower voltages seems to be 21V (main power line is 19.3) ... but not sure this... -
MODEL :RZ09-0330QEM3
MBNB : CH551_MB MP V4.0 20200303
SSN : BY2025M02304135
PN : BLADE 15 STUDIO EDITION -EARLY 2020-RZ09-033
Thank you for your help. It needs cleaning; it's starting very slowly.
Thank you
Sincerely,... -
Hello, I have an LG 50PA6500 Plasma TV, purchased new in 2012.
Unfortunately plasma is not working at all after a power spike.
Qucikly tested the PSU and voltages seems to be okay, when eveything is disconntected from the PSU I got:
VS = 200-206 / actual = 205 V,
VA = 55 / actual = 54.9 V,
M5V = 5.2 / actual = 5.19 V,
17 = 17.24 V,
5.2 = 5.19 V,
STDBY = 5.19 V,
ERROR_DET = 4.8 V - does it mean PSU is damaged? the rest of the voltages seems to be fine.
what's your opinion about the PSU?
Also I just... -
Hello everyone,
I have a Samsung UN55KS800DF
When I turn the TV on the picture initially looks great
After 10 seconds or so, the bottom of the screen starts to show issues and it slowly creeps upward
Eventually the entire display is ghosting and distorted. If I power the TV off for a few minutes and power it back on, the cycle repeats with a good display that slowly degrades.
I have attached an image of the display after about 3 minutes of being powered on
Thanks in advance for all you do for us!...
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